<template>
     <div class="type-nav">
            <div class="container">
                <div @mouseenter="isshow" @mouseleave="noshow">
                <h2 class="all">全部商品分类</h2>
                
                <transition name="sort"><div class="sort" @click="goSearch" v-show="show">
                    <div class="all-sort-list2">
                        <div class="item" v-for="(c1,index) in categoryList" :key="c1.categoryId" @mouseenter="changeIndex(index)" :class="{cur:currentIndex==index}">
                            <h3>
                                <a :data-categoryName="c1.categoryName" :data-category1Id="c1.categoryId">{{c1.categoryName }}</a>
                            </h3>
                            <div class="item-list clearfix" :style="{display:currentIndex==index?'block':'none'}">
                                <div class="subitem" v-for="(c2) in c1.categoryChild " :key="c2.categoryId">
                                    <dl class="fore">
                                        <dt>
                                            <a :data-categoryName="c2.categoryName" :data-category2Id="c2.categoryId">{{ c2.categoryName }}</a>
                                        </dt>
                                        <dd>
                                            <em v-for="(c3) in c2.categoryChild" :key="c3.categoryId">
                                                <a :data-categoryName="c3.categoryName" :data-category3Id="c3.categoryId">{{ c3.categoryName }}</a>
                                            </em>
                                     
                                        </dd>
                                    </dl>
                                </div>
                            </div>
                        </div>
                  
                    </div>
                </div></transition>
            </div>
            <nav class="nav">
                    <a href="###">服装城</a>
                    <a href="###">美妆馆</a>
                    <a href="###">尚品汇超市</a>
                    <a href="###">全球购</a>
                    <a href="###">闪购</a>
                    <a href="###">团购</a>
                    <a href="###">有趣</a>
                    <a href="###">秒杀</a>
                </nav>
            </div>
        </div>
  
</template>

<script>
import throttle from 'lodash/throttle'

//import {mapstate} from 'vuex'
export default {
   name:"TypeNav",
   data(){
    return{
        currentIndex:-1,
        show:true
    }
   },
   methods:{
     changeIndex:throttle(function (index){
        this.currentIndex=index
     },50),
     isshow(){
      this.show=true
     },
     noshow(){
        this.currentIndex=-1
        if(this.$route.path !='/home'){
            this.show=false
        }
      
     },
     goSearch(event){
        let element=event.target
        let {categoryname,category1id,category2id,category3id}=element.dataset  //拿到元素身上的所有自定义属性
        
        if(categoryname){
             let location ={name:'search'}
             let query = {categoryName:categoryname}
            if(category1id){
               query.cagory1Id=category1id
            }else if(category2id){
                query.cagory2Id=category2id
            }else{
                query.cagory3Id=category3id
            }

            if(this.$route.params.keyword){
            location.params=this.$route.params
            location.query=query
            this.$router.push(location)
          }else{
            location.query=query
            this.$router.push(location)
          }         
        }
     }  
   },
   mounted(){
    if(this.$route.path!='/home'){
         this.show=false
    }
   },
   computed:{
    //...mapstate('home',['categoryList'])
    categoryList(){
        return this.$store.state.home.categoryList
    }
   }
}
</script>

<style scoped lang='less'>
.cur{
    background-color: skyblue;
}
  .type-nav {
        border-bottom: 2px solid #e1251b;

        .container {
            width: 1200px;
            margin: 0 auto;
            display: flex;
            position: relative;

            .all {
                width: 210px;
                height: 45px;
                background-color: #e1251b;
                line-height: 45px;
                text-align: center;
                color: #fff;
                font-size: 14px;
                font-weight: bold;
            }

            .nav {
                a {
                    height: 45px;
                    margin: 0 22px;
                    line-height: 45px;
                    font-size: 16px;
                    color: #333;
                }
            }
    @keyframes atguigu {
          from{
              transform: translateY(100%);
             }
           to{
             transform: translateY(0px);
             }
    }
  
            .sort {
                position: absolute;
                left: 0;
                top: 45px;
                width: 210px;
                height: 461px;
                position: absolute;
                background: #fafafa;
                z-index: 999;

                .all-sort-list2 {
                    .item {
                        h3 {
                            line-height: 30px;
                            font-size: 14px;
                            font-weight: 400;
                            overflow: hidden;
                            padding: 0 20px;
                            margin: 0;

                            a {
                                color: #333;
                            }
                        }

                        .item-list {
                            display: none;
                            position: absolute;
                            width: 734px;
                            min-height: 460px;
                            background: #f7f7f7;
                            left: 210px;
                            border: 1px solid #ddd;
                            top: 0;
                            z-index: 9999 !important;

                            .subitem {
                                float: left;
                                width: 650px;
                                padding: 0 4px 0 8px;

                                dl {
                                    border-top: 1px solid #eee;
                                    padding: 6px 0;
                                    overflow: hidden;
                                    zoom: 1;

                                    &.fore {
                                        border-top: 0;
                                    }

                                    dt {
                                        float: left;
                                        width: 54px;
                                        line-height: 22px;
                                        text-align: right;
                                        padding: 3px 6px 0 0;
                                        font-weight: 700;
                                    }

                                    dd {
                                        float: left;
                                        width: 415px;
                                        padding: 3px 0 0;
                                        overflow: hidden;

                                        em {
                                            float: left;
                                            height: 14px;
                                            line-height: 14px;
                                            padding: 0 8px;
                                            margin-top: 5px;
                                            border-left: 1px solid #ccc;
                                        }
                                    }
                                }
                            }
                        }

                       
                    }
                    
                }
            }
            
            
        }
    }

</style>